{ "contractName": "Utils", "abi": [ { "constant": true, "inputs": [ { "name": "_hash", "type": "bytes32" }, { "name": "N", "type": "bytes" }, { "name": "E", "type": "bytes" }, { "name": "S", "type": "bytes" } ], "name": "verify", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function", "signature": "0xc658da51" }, { "constant": true, "inputs": [ { "name": "_hash", "type": "bytes32" }, { "name": "signature", "type": "bytes" } ], "name": "recoverSigner", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "pure", "type": "function", "signature": "0x97aba7f9" }, { "constant": true, "inputs": [ { "name": "_sender", "type": "address" }, { "name": "_player", "type": "address" }, { "name": "_bankroller", "type": "address" }, { "name": "_hash", "type": "bytes32" }, { "name": "_signature", "type": "bytes" } ], "name": "checkSigner", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "pure", "type": "function", "signature": "0x7190881e" }, { "constant": true, "inputs": [ { "name": "signature", "type": "bytes" } ], "name": "signatureSplit", "outputs": [ { "name": "r", "type": "bytes32" }, { "name": "s", "type": "bytes32" }, { "name": "v", "type": "uint8" } ], "payable": false, "stateMutability": "pure", "type": "function", "signature": "0xefcd1cd9" }, { "constant": true, "inputs": [ { "name": "_users", "type": "address[2]" }, { "name": "_hash", "type": "bytes32" }, { "name": "v", "type": "uint8[2]" }, { "name": "r", "type": "bytes32[2]" }, { "name": "s", "type": "bytes32[2]" } ], "name": "checkDoubleSignature", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "pure", "type": "function", "signature": "0x38a6fcf0" } ], "bytecode": 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"source": "pragma solidity ^0.4.24;\n\n/**\n * @title Utils\n * @dev Library for operations with signatures\n */\nlibrary Utils {\n\n /**\n @notice Verify of RSA sign\n @param _hash raw message\n @param N N-component of RSA public keys\n @param E E-component of RSA public keys\n @param S Signature of the raw message\n */\n function verify(bytes32 _hash, bytes N, bytes E, bytes S) external view returns (bool) {\n bool retS;\n bytes memory valS;\n (retS, valS) = modexp(S, E, N);\n bytes32 valS32 = sliceLastBytes32(valS);\n return (retS == true && valS32 == _hash);\n }\n\n /**\n @notice Recover address from signature and hash\n @param _hash Hash for signature\n @param signature Signature hash\n @return The subscriber hash address\n */\n function recoverSigner(bytes32 _hash, bytes signature) public pure returns(address) {\n bytes32 r;\n bytes32 s;\n uint8 v;\n (r, s, v) = signatureSplit(signature);\n return ecrecover(_hash, v, r, s);\n }\n\n /**\n @notice check signer\n @param _sender msg.sender address\n @param _player player address\n @param _bankroller bankroller address\n @param _hash message hash\n @param _signature signature\n @return result\n */\n function checkSigner(address _sender, address _player, address _bankroller, bytes32 _hash, bytes _signature) external pure returns(bool) {\n address _signer = recoverSigner(_hash, _signature);\n require(_signer == _player || _signer == _bankroller, 'invalid signature');\n require(_sender != _signer, 'invalid msg.sender');\n require(_sender == _player || _sender == _bankroller, 'sender is not a member');\n return true;\n }\n\n /**\n * @dev Splits signature to R, S and V parts\n * @param signature interpretation of signature\n * @return Parts of signature\n */\n function signatureSplit(bytes signature) public pure returns(bytes32 r, bytes32 s, uint8 v) {\n assembly {\n r := mload(add(signature, 32))\n s := mload(add(signature, 64))\n v := and(mload(add(signature, 65)), 0xff)\n }\n require(v == 27 || v == 28);\n }\n\n function checkDoubleSignature(address[2] _users, bytes32 _hash, uint8[2] v, bytes32[2] r, bytes32[2] s) external pure returns(bool) {\n if (\n (ecrecover(_hash, v[0], r[0], s[0]) == _users[0] && ecrecover(_hash, v[1], r[1], s[1]) == _users[1]) ||\n (ecrecover(_hash, v[0], r[0], s[0]) == _users[1] && ecrecover(_hash, v[1], r[1], s[1]) == _users[0])\n ) {\n return true;\n }\n return false;\n }\n\n function checkSum(uint256[2] _a, uint256[2] _b) internal pure returns(bool) {\n if(_a[0] + _a[1] == _b[0] + _b[1]) {\n return true;\n }\n return false;\n }\n\n function memcopy(bytes src, uint srcoffset, bytes dst, uint dstoffset, uint len) pure internal {\n assembly {\n //begining of data in src and dst\n src := add(src, add(32, srcoffset))\n dst := add(dst, add(32, dstoffset))\n\n // copy 32 bytes at once\n for\n {} //counter not needed\n iszero(lt(len, 32)) //untill (len>32)\n {\n dst := add(dst, 32) //destination pointer shift to 32 bytes\n src := add(src, 32) //source pointer shift to 32 bytes\n len := sub(len, 32) //length of the remainder decrease to 32 bytes\n }\n { mstore(dst, mload(src)) }\n // copy the remainder (0 < len < 32)\n let mask := sub(exp(256, sub(32, len)), 1) //256^(32-len) - 1\n let srcpart := and(mload(src), not(mask)) //select first len bytes\n let dstpart := and(mload(dst), mask) //set to zero first len bytes\n mstore(dst, or(srcpart, dstpart)) //first len bits of source copy to dst\n }\n }\n\n function modexp(bytes base, bytes exponent, bytes modulus) internal view returns (bool success, bytes output) {\n uint base_length = base.length;\n uint exponent_length = exponent.length;\n uint modulus_length = modulus.length;\n\n //Allocate memory for input\n uint size = (32 * 3) + base_length + exponent_length + modulus_length;\n bytes memory input = new bytes(size);\n\n ////Allocate memory for output\n output = new bytes(modulus_length);\n\n //Push lengths on the stack\n assembly {\n //mstore(addr, src) - push src to addr on the stack\n mstore(add(input, 32), base_length) //push base_length on the bytes[0]\n mstore(add(input, 64), exponent_length)\n mstore(add(input, 96), modulus_length)\n }\n //push base on the stack\n memcopy(base, 0, input, 96, base_length);\n //push exponent on the stack\n memcopy(exponent, 0, input, 96 + base_length, exponent_length);\n //push modulus on the stack\n memcopy(modulus, 0, input, 96 + base_length + exponent_length, modulus_length);\n\n //call bigModExp precompiled contract\n assembly {\n success := staticcall(gas(), 5, add(input, 32), size, add(output, 32), modulus_length)\n }\n }\n\n function sliceLastBytes32(bytes bytesArr) internal pure returns(bytes32 result) {\n uint length = bytesArr.length;\n assembly {\n result := mload(add(bytesArr, length))\n }\n }\n\n}", "sourcePath": "/Users/fanyshu/Documents/Projects/DCLabs/monorepo/packages/dc-sdk-example/dapp/contracts/library/Utils.sol", "ast": { "absolutePath": 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"isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 1964, "name": "retS", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1943, "src": "563:4:12", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "hexValue": "74727565", "id": 1965, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "571:4:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "src": "563:12:12", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "id": 1969, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 1967, "name": "valS32", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1959, "src": "579:6:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 1968, "name": "_hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1931, "src": "589:5:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "src": "579:15:12", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "563:31:12", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 1971, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "562:33:12", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 1941, "id": 1972, "nodeType": "Return", "src": "555:40:12" } ] }, "documentation": "@notice Verify of RSA sign\n@param _hash raw message\n@param N N-component of RSA public keys\n@param E E-component of RSA public keys\n@param S Signature of the raw message", "id": 1974, "implemented": true, "isConstructor": false, "isDeclaredConst": true, "modifiers": [], "name": "verify", "nodeType": "FunctionDefinition", "parameters": { "id": 1938, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1931, "name": "_hash", "nodeType": "VariableDeclaration", "scope": 1974, "src": "339:13:12", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 1930, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "339:7:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 1933, "name": "N", "nodeType": "VariableDeclaration", "scope": 1974, "src": "354:7:12", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes" }, "typeName": { "id": 1932, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "354:5:12", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 1935, "name": "E", "nodeType": "VariableDeclaration", "scope": 1974, "src": "363:7:12", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes" }, "typeName": { "id": 1934, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "363:5:12", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, 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"1949:9:12", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 2069, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1949:7:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2072, "name": "v", "nodeType": "VariableDeclaration", "scope": 2086, "src": "1960:7:12", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 2071, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "1960:5:12", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": null, "visibility": "internal" } ], "src": "1937:31:12" }, "scope": 2338, "src": "1877:305:12", "stateMutability": "pure", "superFunction": null, "visibility": "public" }, { "body": { "id": 2184, "nodeType": "Block", "src": "2320:318:12", "statements": [ { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 2177, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 2141, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 2124, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2110, "name": "_hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2092, "src": "2358:5:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2111, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2096, "src": "2365:1:12", "typeDescriptions": { "typeIdentifier": "t_array$_t_uint8_$2_calldata_ptr", "typeString": "uint8[2] calldata" } }, "id": 2113, "indexExpression": { "argumentTypes": null, "hexValue": "30", "id": 2112, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2367:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2365:4:12", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2114, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2100, "src": "2371:1:12", "typeDescriptions": { "typeIdentifier": "t_array$_t_bytes32_$2_calldata_ptr", "typeString": "bytes32[2] calldata" } }, "id": 2116, "indexExpression": { "argumentTypes": null, "hexValue": "30", "id": 2115, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2373:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2371:4:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2117, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2104, "src": 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"ecrecover", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3269, "src": "2348:9:12", "typeDescriptions": { "typeIdentifier": "t_function_ecrecover_pure$_t_bytes32_$_t_uint8_$_t_bytes32_$_t_bytes32_$returns$_t_address_$", "typeString": "function (bytes32,uint8,bytes32,bytes32) pure returns (address)" } }, "id": 2120, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2348:34:12", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2121, "name": "_users", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2090, "src": "2386:6:12", "typeDescriptions": { "typeIdentifier": "t_array$_t_address_$2_calldata_ptr", "typeString": "address[2] calldata" } }, "id": 2123, "indexExpression": { "argumentTypes": null, "hexValue": "30", "id": 2122, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2393:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2386:9:12", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "2348:47:12", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 2140, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2126, "name": "_hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2092, "src": "2409:5:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2127, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2096, "src": "2416:1:12", "typeDescriptions": { "typeIdentifier": "t_array$_t_uint8_$2_calldata_ptr", "typeString": "uint8[2] calldata" } }, "id": 2129, "indexExpression": { "argumentTypes": null, "hexValue": "31", "id": 2128, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2418:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2416:4:12", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2130, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2100, "src": "2422:1:12", "typeDescriptions": { "typeIdentifier": "t_array$_t_bytes32_$2_calldata_ptr", "typeString": "bytes32[2] calldata" } }, "id": 2132, "indexExpression": { "argumentTypes": null, "hexValue": "31", "id": 2131, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2424:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2422:4:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2133, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2104, "src": "2428:1:12", "typeDescriptions": { "typeIdentifier": "t_array$_t_bytes32_$2_calldata_ptr", "typeString": "bytes32[2] calldata" } }, "id": 2135, "indexExpression": { "argumentTypes": null, "hexValue": "31", "id": 2134, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2430:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2428:4:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_uint8", "typeString": "uint8" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 2125, "name": "ecrecover", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3269, "src": "2399:9:12", "typeDescriptions": { "typeIdentifier": "t_function_ecrecover_pure$_t_bytes32_$_t_uint8_$_t_bytes32_$_t_bytes32_$returns$_t_address_$", "typeString": "function (bytes32,uint8,bytes32,bytes32) pure returns (address)" } }, "id": 2136, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2399:34:12", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2137, "name": "_users", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2090, "src": "2437:6:12", "typeDescriptions": { "typeIdentifier": "t_array$_t_address_$2_calldata_ptr", "typeString": "address[2] calldata" } }, "id": 2139, "indexExpression": { "argumentTypes": null, "hexValue": "31", "id": 2138, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2444:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2437:9:12", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "2399:47:12", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "2348:98:12", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 2142, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "2347:100:12", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 2175, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 2158, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2144, "name": "_hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2092, "src": "2474:5:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2145, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2096, "src": "2481:1:12", "typeDescriptions": { "typeIdentifier": "t_array$_t_uint8_$2_calldata_ptr", "typeString": "uint8[2] calldata" } }, "id": 2147, "indexExpression": { "argumentTypes": null, "hexValue": "30", "id": 2146, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2483:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2481:4:12", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2148, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2100, "src": "2487:1:12", "typeDescriptions": { "typeIdentifier": "t_array$_t_bytes32_$2_calldata_ptr", "typeString": "bytes32[2] calldata" } }, "id": 2150, "indexExpression": { "argumentTypes": null, "hexValue": "30", "id": 2149, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2489:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2487:4:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2151, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2104, "src": "2493:1:12", "typeDescriptions": { "typeIdentifier": "t_array$_t_bytes32_$2_calldata_ptr", "typeString": "bytes32[2] calldata" } }, "id": 2153, "indexExpression": { "argumentTypes": null, "hexValue": "30", "id": 2152, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2495:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2493:4:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_uint8", "typeString": "uint8" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 2143, "name": "ecrecover", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3269, "src": "2464:9:12", "typeDescriptions": { "typeIdentifier": "t_function_ecrecover_pure$_t_bytes32_$_t_uint8_$_t_bytes32_$_t_bytes32_$returns$_t_address_$", "typeString": "function (bytes32,uint8,bytes32,bytes32) pure returns (address)" } }, "id": 2154, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2464:34:12", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2155, "name": "_users", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2090, "src": "2502:6:12", "typeDescriptions": { "typeIdentifier": "t_array$_t_address_$2_calldata_ptr", "typeString": "address[2] calldata" } }, "id": 2157, "indexExpression": { "argumentTypes": null, "hexValue": "31", "id": 2156, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2509:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2502:9:12", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "2464:47:12", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 2174, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2160, "name": "_hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2092, "src": "2525:5:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2161, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2096, "src": "2532:1:12", "typeDescriptions": { "typeIdentifier": "t_array$_t_uint8_$2_calldata_ptr", "typeString": "uint8[2] calldata" } }, "id": 2163, "indexExpression": { "argumentTypes": null, "hexValue": "31", "id": 2162, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2534:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2532:4:12", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2164, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2100, "src": "2538:1:12", "typeDescriptions": { "typeIdentifier": "t_array$_t_bytes32_$2_calldata_ptr", "typeString": "bytes32[2] calldata" } }, "id": 2166, "indexExpression": { "argumentTypes": null, "hexValue": "31", "id": 2165, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2540:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": 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"ElementaryTypeName", "src": "2879:5:12", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2228, "name": "dstoffset", "nodeType": "VariableDeclaration", "scope": 2235, "src": "2890:14:12", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2227, "name": "uint", "nodeType": "ElementaryTypeName", "src": "2890:4:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2230, "name": "len", "nodeType": "VariableDeclaration", "scope": 2235, "src": "2906:8:12", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2229, "name": "uint", "nodeType": "ElementaryTypeName", "src": "2906:4:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "2851:64:12" }, "payable": false, "returnParameters": { "id": 2232, "nodeType": "ParameterList", "parameters": [], "src": "2930:0:12" }, "scope": 2338, "src": "2835:1068:12", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 2322, "nodeType": "Block", "src": "4019:1190:12", "statements": [ { "assignments": [ 2249 ], "declarations": [ { "constant": false, "id": 2249, "name": "base_length", "nodeType": "VariableDeclaration", "scope": 2323, "src": "4029:16:12", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2248, "name": "uint", "nodeType": "ElementaryTypeName", "src": "4029:4:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": 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"typeName": { "id": 2253, "name": "uint", "nodeType": "ElementaryTypeName", "src": "4069:4:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 2257, "initialValue": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 2255, "name": "exponent", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2239, "src": "4092:8:12", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 2256, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4092:15:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "4069:38:12" }, { "assignments": [ 2259 ], "declarations": [ { "constant": false, "id": 2259, "name": "modulus_length", "nodeType": "VariableDeclaration", "scope": 2323, "src": "4117:19:12", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2258, "name": "uint", "nodeType": "ElementaryTypeName", "src": "4117:4:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 2262, "initialValue": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 2260, "name": "modulus", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2241, "src": "4139:7:12", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 2261, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4139:14:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "4117:36:12" }, { "assignments": [ 2264 ], "declarations": [ { "constant": false, "id": 2264, "name": "size", "nodeType": "VariableDeclaration", "scope": 2323, "src": "4200:9:12", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2263, "name": "uint", "nodeType": "ElementaryTypeName", "src": "4200:4:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 2275, "initialValue": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2274, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2272, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2270, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_rational_96_by_1", "typeString": "int_const 96" }, "id": 2267, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "hexValue": "3332", "id": 2265, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "4213:2:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_32_by_1", "typeString": "int_const 32" }, "value": "32" }, "nodeType": "BinaryOperation", "operator": "*", "rightExpression": { "argumentTypes": null, "hexValue": "33", "id": 2266, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "4218:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_3_by_1", "typeString": "int_const 3" }, "value": "3" }, "src": "4213:6:12", "typeDescriptions": { "typeIdentifier": "t_rational_96_by_1", "typeString": "int_const 96" } } ], "id": 2268, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "4212:8:12", "typeDescriptions": { "typeIdentifier": "t_rational_96_by_1", "typeString": "int_const 96" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "argumentTypes": null, "id": 2269, "name": "base_length", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2249, "src": "4223:11:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "4212:22:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "argumentTypes": null, "id": 2271, "name": "exponent_length", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2254, "src": "4237:15:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "4212:40:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "argumentTypes": null, "id": 2273, "name": "modulus_length", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2259, "src": "4255:14:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "4212:57:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "4200:69:12" }, { "assignments": [ 2277 ], "declarations": [ { "constant": false, "id": 2277, "name": "input", "nodeType": "VariableDeclaration", "scope": 2323, "src": "4279:18:12", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 2276, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "4279:5:12", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "id": 2282, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2280, "name": "size", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2264, "src": "4310:4:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2279, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "NewExpression", "src": "4300:9:12", "typeDescriptions": { "typeIdentifier": "t_function_objectcreation_pure$_t_uint256_$returns$_t_bytes_memory_$", "typeString": "function (uint256) pure returns (bytes memory)" }, "typeName": { "id": 2278, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "4304:5:12", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } } }, "id": 2281, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4300:15:12", "typeDescriptions": { "typeIdentifier": "t_bytes_memory", "typeString": "bytes memory" } }, "nodeType": "VariableDeclarationStatement", "src": "4279:36:12" }, { "expression": { "argumentTypes": null, "id": 2288, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 2283, "name": "output", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2246, "src": "4365:6:12", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2286, "name": "modulus_length", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2259, "src": "4384:14:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2285, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "NewExpression", "src": "4374:9:12", "typeDescriptions": { "typeIdentifier": "t_function_objectcreation_pure$_t_uint256_$returns$_t_bytes_memory_$", "typeString": "function (uint256) pure returns (bytes memory)" }, "typeName": { "id": 2284, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "4378:5:12", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } } }, "id": 2287, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4374:25:12", "typeDescriptions": { "typeIdentifier": "t_bytes_memory", "typeString": "bytes memory" } }, "src": "4365:34:12", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 2289, "nodeType": "ExpressionStatement", "src": "4365:34:12" }, { "externalReferences": [ { "base_length": { "declaration": 2249, "isOffset": false, "isSlot": false, "src": "4552:11:12", "valueSize": 1 } }, { "input": { "declaration": 2277, "isOffset": false, "isSlot": false, "src": "4540:5:12", "valueSize": 1 } }, { "exponent_length": { "declaration": 2254, "isOffset": false, "isSlot": false, "src": "4635:15:12", "valueSize": 1 } }, { "input": { "declaration": 2277, "isOffset": false, "isSlot": false, "src": "4623:5:12", "valueSize": 1 } }, { "modulus_length": { "declaration": 2259, "isOffset": false, "isSlot": false, "src": "4687:14:12", "valueSize": 1 } }, { "input": { "declaration": 2277, "isOffset": false, "isSlot": false, "src": "4675:5:12", "valueSize": 1 } } ], "id": 2290, "nodeType": "InlineAssembly", "operations": "{\n mstore(add(input, 32), base_length)\n mstore(add(input, 64), exponent_length)\n mstore(add(input, 96), modulus_length)\n}", "src": "4446:315:12" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2292, "name": "base", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2237, "src": "4762:4:12", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "argumentTypes": null, "hexValue": "30", "id": 2293, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "4768:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, { "argumentTypes": null, "id": 2294, "name": "input", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2277, "src": "4771:5:12", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "argumentTypes": null, "hexValue": "3936", "id": 2295, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "4778:2:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_96_by_1", "typeString": "int_const 96" }, "value": "96" }, { "argumentTypes": null, "id": 2296, "name": "base_length", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2249, "src": "4782:11:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_rational_96_by_1", "typeString": "int_const 96" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2291, "name": "memcopy", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2235, "src": "4754:7:12", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes_memory_ptr_$_t_uint256_$_t_bytes_memory_ptr_$_t_uint256_$_t_uint256_$returns$__$", "typeString": "function (bytes memory,uint256,bytes memory,uint256,uint256) pure" } }, "id": 2297, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4754:40:12", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2298, "nodeType": "ExpressionStatement", "src": "4754:40:12" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2300, "name": "exponent", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2239, "src": "4849:8:12", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "argumentTypes": null, "hexValue": "30", "id": 2301, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "4859:1:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, { "argumentTypes": null, "id": 2302, "name": "input", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2277, "src": "4862:5:12", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2305, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "hexValue": "3936", "id": 2303, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "4869:2:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_96_by_1", "typeString": "int_const 96" }, "value": "96" }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "argumentTypes": null, "id": 2304, "name": "base_length", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2249, "src": "4874:11:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "4869:16:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 2306, "name": "exponent_length", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2254, "src": "4887:15:12", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2299, "name": "memcopy", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2235, "src": "4841:7:12", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes_memory_ptr_$_t_uint256_$_t_bytes_memory_ptr_$_t_uint256_$_t_uint256_$returns$__$", "typeString": "function (bytes memory,uint256,bytes memory,uint256,uint256) pure" } }, "id": 2307, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4841:62:12", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2308, "nodeType": "ExpressionStatement", "src": "4841:62:12" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2310, "name": "modulus", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2241, "src": "4957:7:12", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "argumentTypes": null, "hexValue": "30", "id": 2311, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", 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